メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.747895727538 40.3107462315392, 140.747575119603 40.3121602066664, 140.745746686966 40.3119726064995, 140.746001667977 40.3097826955142, 140.746237043179 40.3098819472561, 140.74641360786 40.3099338696768, 140.746560742597 40.3099767624367, 140.746734373125 40.3100241776786, 140.747190628051 40.3100605476287, 140.74740843622 40.310083227373, 140.747458410992 40.3101463097918, 140.747636234316 40.310365974381, 140.747891914881 40.3107174153911, 140.747895727538 40.3107462315392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral